Cause
You specified a column in the column list of an index of an index set which is too long
You specified a column in the column list of an index of an index set which is too long
CHAR and VARCHAR2 columns must be 30 bytes or less max length
Try the following links for this error:
http://docs.oracle.com/cd/E16655_01/server.121/e26079/drgus.htm
https://community.oracle.com/message/10092836
https://community.oracle.com/message/1947208
https://community.oracle.com/message/9782815
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